package com.nowcoder.community.controller;

import com.nowcoder.community.annotation.LoginRequired;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.HostHolder;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

/**
 * @Author Cl
 * @Date 2024-2024/4/29  14:36
 * @Description 用户设置相关
 */
@Controller
@RequestMapping("/user")
public class UserController {

    private static final Logger logger = LoggerFactory.getLogger(UserController.class);

    @Value("${community.path.upload}")
    private String uploadPath;

    @Value("${community.path.domain}")
    private String domain;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @Autowired
    private UserService userService;

    @Autowired
    private HostHolder hostHolder;

    /**设置页面的后端接口*/
    @LoginRequired
    @RequestMapping(path = "/setting",method = RequestMethod.GET)
    public String getSettingPage(){
        return "/site/setting";
    }

    /**上传头像的后端处理接口*/
    @LoginRequired
    @RequestMapping(path = "/upload",method = RequestMethod.POST)
    public String uploadHeader(MultipartFile headerImage , Model model){
        if(headerImage == null){
            model.addAttribute("error","您还没有选择图片!");
            return "/site/setting";
        }
        String fileName = headerImage.getOriginalFilename();
        String suffix = fileName.substring(fileName.lastIndexOf("."));
        if(StringUtils.isBlank(suffix)){
            model.addAttribute("error","文件格式不正确!");
            return "/site/setting";
        }
        // 生成随机文件名
        fileName = CommunityUtil.generateUUID() + suffix;
        // 存放文件
        File dest = new File(uploadPath + "/" + fileName);
        try {
            headerImage.transferTo(dest);
        }catch (IOException e){
            logger.error("上传文件失败:"+e.getMessage());
            throw new RuntimeException("上传文件失败 , 服务器发生异常!");
        }

        // 更新当前用户的头像路径(后端接口路径) 例如:http://localhost:8080/community/user/header/xxx.png
        User user = hostHolder.getUser();
        String headerUrl = domain + contextPath + "/user/header/" + fileName;
        userService.updateHeader(user.getId() , headerUrl);
        return "redirect:/index";
    }

    /**响应头像图片的后端接口*/
    @RequestMapping(path = "/header/{fileName}",method = RequestMethod.GET)
    public void getHeader(@PathVariable("fileName") String fileName, HttpServletResponse response){
        String suffix = fileName.substring(fileName.lastIndexOf("."));
        String path = uploadPath +"/" + fileName; //文件的存储路径
        // 响应图片
        response.setContentType("image/"+suffix);
        try(
                FileInputStream fis = new FileInputStream(path);
            ServletOutputStream os = response.getOutputStream()
        ) {
            byte[] buffer = new byte[1024];
            int b = 0;
            while ((b = fis.read(buffer)) != -1) os.write(buffer ,0, b);
        } catch (IOException e) {
            logger.error("读取头像失败:"+e.getMessage());
        }
    }



}
